Category Archives: Tools

Apache Impala (incubating) enables low-latency interactive SQL queries on data stored in HDFS, Amazon S3, Apache Kudu, and Apache HBase. With the availability of the R package implyr on CRAN and GitHub, it’s now possible to query Impala from R using the popular package dplyr.

In a previous installment of our series about quality assurance inside Cloudera, we described the fault-injection frameworks (AgenTEST and Sapper) that Cloudera Engineering has devised. The fault-injection framework starts and stops injections, to determine when and how they should occur, respectively.

On that occasion, we presented a number of disk-related injections implemented in AgenTEST, including:

Earlier this year, members of the Python data tools and Impala teams at Cloudera began collaborating to create a new C++ library to eventually become a faster, more memory-efficient replacement for impyla, PyHive, and other (largely pure Python) client libraries for talking to Hive and Impala.

Cloudera Engineering has developed (and recently open sourced) a distributed unit testing framework that cuts testing time from multiple hours to just 10 minutes.

Upstream unit tests are Cloudera’s first line of defense for finding and fixing software bugs, as part of a multidimensional process that also includes static/dynamic code analysis, fault injection, integration/scale/endurance testing, and validation on real workloads. However, running a full unit test suite for Apache Hadoop ecosystem components can take hours,